Do you know of a 28ft ketch called Mamari?

I'm trying to track down a 28ft ketch called Mamari, that sailed from New Zealand in the 1960s to Chesapeake Bay. The owner at that time, Kenneth Court, wrote an account of his trip "Extended Cruising - An Overview, 1975", which was published through the Chesapeake Sailing Yacht Symposia.

I am trying to track down the yacht and owner, and would also like a copy of the paper (the link on the Symposia website is not longer live).

My father built Mamari in the late 1950s, before sailing around the Pacific on her. He sold the boat in about 1960, I think.

Any information welcome.